I don't understand how this can be useful without taking into account your teammates and enemies. For example, as Caitlyn I wouldn't want to take Legend Bloodli

I don't understand how this can be useful without taking into account your teammates and enemies. For example, as Caitlyn I wouldn't want to take Legend Bloodline if my support was a Soraka, but otherwise it's better than Legend Alacrity in most cases. It suggests Triumph over Overheal for Aphelios even though that rune is much more synergistic due to his pistol. I appreciate that the tool exists, but there are problems that are more easily solved by small critical thinking than machines.